For carefully-arranged food in a famous restaurant, the cook is regarded as the creator of a work. Before it can be made public on Facebook and similar media, permission must first be asked of the chef.
The situation goes back to a German court judgment from 2013, which widened copyright law to include the applied arts too.
As a result, the threshold for copyrightability was lowered considerably, with the practical consequence that it was easier for chefs to sue those who posted photographs of their creations without permission.
The Die Welt article notes that if a restaurant owner puts up a notice refusing permission for photos to be taken of its food then this ban can apply even to unattractive food dumped unceremoniously on a plate.
What makes this interesting is that it is the lack of copyright in food that anchored innovations in the industry.